1. [ noun ] (mathematics,geometry) a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
Related terms: polyhedron triangular_prism quadrangular_prism parallelepiped
2. [ noun ] (physics,optics) optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
Synonyms: optical_prism
Related terms: optical_device erecting_prism spectroscope telescope biprism
Similar spelling:   prismoid